dynapol® · coating paint developments was the formulation of perfectly high gloss or matted...
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Evonik Industries AG | DYNAPOL® | July 2015 Page 1/2
DYNAPOL®
Competency: Surface Modification
Modern and decorative – “wrinkle coatings” based on DYNAPOL® polyester resins
Modern, high quality architectural top coat systems are not just characterized by high weathering resistance, durability and excellent mechanical properties. Attractive paint surface designs and structural effects are becoming more and more important, following the motto “optimum functionality combined with most decorative visual appearance”.
Besides typical textured paints based on DYNAPOL® polyester resins and VESTOSINT® polyamide or DEGALAN® polymethacrylate fine powders as texturizing additive, so called “wrinkle-coat” systems are gaining higher interest by the end-users over the last years.
Wrinkle coated steel and aluminum metal strips are predominantly used for roofing and wall claddings, due to their visually interesting decorative appearance they are also used for domestic appliance housings and construction work sheets.
Continuous customer requests were the reason to start the development work for DYNAPOL® based wrinkle coatings by the application technology team of the product group Pre-Coated Metal of Evonik Industries AG. So far the priority objective of coil coating paint developments was the formulation of perfectly high gloss or matted surfaces (15-30 microns dry film thickness), free of any defects. Contrary to this, wrinkle effects are caused by specifically created microscopically small surface disruptions.
Evonik Corporation Coating & Adhesive Resins, 299 Jefferson Road, Parsippany, NJ 07054, USA Phone +1 973 929-8453, fax +1973 929-8460, [email protected] www.evonik.com
The desired wrinkle effect needs to be developed by skillful paint formulation. It was found that the right choice and amount of catalyst which is needed for the crosslinking reaction between the polyester and the melamine resp. polyisocyanate is playing an essential role. Various solvent combinations are also supporting different wrinkle structures (fine to rough). Numerous DYNAPOL® coil coating top coat wrinkle starting formulations (pigmented or clear) are available for interested customers. Images of a wrinkle structured top coat:
a) Light microscopic imageb) 3D image
Disclaimer This information and all further technical advice is based on our present knowledge and experi-ence. However, it implies no liability or other legal responsibility on our part, including with regard to existing third party intellectual property rights, especially patent rights. In particular, no warranty, whether express or implied, or guarantee of product properties in the legal sense is intended or implied. We reserve the right to make any changes according to technological progress or further developments. The customer is not released from the obligation to conduct careful inspection and testing of incoming goods. Performance of the product described herein should be verified by testing, which should be carried out only by qualified experts in the sole responsibility of a customer. Reference to trade names used by other companies is neither a recommendation, nor does it imply that similar products could not be used.
(april 2008)